I not sure how the first radio active element was formed but when it release radiation it also release other radioactive elements.
For example:
the element actinium, radiates and releases thorium. thorium radiates and releases francium. all of these are radioactive elements.
adaptive radiation formed mant new land plant species
When ultraviolet radiation decomposes chlorinated hydrocarbons, such as chlorofluorocarbons (CFCs), the gas formed is typically chlorine gas (Cl2). This process is known as photodissociation, where the high-energy UV radiation breaks the carbon-chlorine bonds in the hydrocarbon, releasing chlorine gas as a byproduct. Chlorine gas is a highly reactive and toxic substance that can have detrimental effects on the environment and human health.
Phosgene is not formed by the decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. It is produced by the reaction of carbon monoxide with chlorine gas under certain conditions. Phosgene is a highly toxic and irritating gas that was used as a chemical warfare agent during World War I.
The molecule formed is ozone. It is present as the ozone layer.
The stratospheric ozone layer is formed when oxygen molecules (O2) in the stratosphere are broken apart by ultraviolet (UV) radiation from the sun. These oxygen atoms (O) then combine with other oxygen molecules to form ozone (O3). The ozone layer plays a crucial role in absorbing and deflecting harmful UV radiation.
How gamma radiation is formed
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adaptive radiation formed mant new land plant species
heat and friction.
electromagnetic radiations are formed due to the disturbances in electric and magnetic fields which are perpendicular to each other.
Onyx is generally not significantly affected by radiation. It is a type of chalcedony quartz that is naturally formed and does not contain radioactive elements that would react to radiation in a noticeable way.
Cosmic Background Radiation
When ultraviolet radiation decomposes chlorinated hydrocarbons, such as chlorofluorocarbons (CFCs), the gas formed is typically chlorine gas (Cl2). This process is known as photodissociation, where the high-energy UV radiation breaks the carbon-chlorine bonds in the hydrocarbon, releasing chlorine gas as a byproduct. Chlorine gas is a highly reactive and toxic substance that can have detrimental effects on the environment and human health.
Phosgene is not formed by the decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. It is produced by the reaction of carbon monoxide with chlorine gas under certain conditions. Phosgene is a highly toxic and irritating gas that was used as a chemical warfare agent during World War I.
A photon is formed when an electron transitions to a lower energy level within an atom or molecule, releasing energy in the form of electromagnetic radiation. This energy is carried by the photon as a discrete particle-like bundle of electromagnetic radiation.
In the atomic nucleus as protons and/or neutrons fall from excited states towards their ground state.
Polonium-212 is formed by beta decay of bismuth-212.